Neutral particles from Cygnus X-3 above 5 times 10 sup 17 eV. [Cyg X-3]

Journal Article · Mon Apr 02 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.1628· OSTI ID:7189017

Teshima, M; Matsubara, Y; Nagano, M; Hara, T; Hayashida, N; Honda, M; Kamata, K; Kifune, T; Ohoka, H ^[1]

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1. Institute for Cosmic Ray Research, University of Tokyo, Tokyo 188 (JP) Department of Physics, Tokyo Institute of Technology, Tokyo 152, Japan (JP)

The emission of neutral particles from Cygnus X-3 has been searched for at energies above 5{times}10{sup 17} eV, using data from the Akeno 20-km{sup 2} air-shower array spanning the period December 1984 to July 1989. A 3.5{sigma} dc excess is observed aroung the Cygnus X-3 region. This excess corresponds to a flux of (1.8{plus minus}0.7){times}10{sup {minus}17} cm{sup {minus}2} s{sup {minus}1} above 5{times}10{sup 17} eV, in agreement with the Fly's Eye data, but not the Haverah Park data. The signals do not show any 4.8-h periodicity. Their arrival times seem to be bunched in correlation with event-rate increases observed at 10{sup 16} eV with the Akeno 1-km{sup 2} array.

• OSTI ID: 7189017
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:14; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIATION
COSMIC SHOWERS
DATA
DATA ANALYSIS
ENERGY RANGE
EXPERIMENTAL DATA
INFORMATION
IONIZING RADIATIONS
NEUTRAL PARTICLES
NUMERICAL DATA
PARTICLES
PEV RANGE
RADIATIONS
SECONDARY COSMIC RADIATION
SHOWERS